common/dyn_arr.h


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#ifndef __MICRO_VEC_H__
#define __MICRO_VEC_H__

#include "common.h"

#define DA_MIN_CAP 8
#define DA_GROW_RATE 2

#define da_create(T, init_capacity) \
        ((T*)_da_create(sizeof(T), init_capacity))

#define da_len_ptr(arr) ((int*)arr - 2)
#define da_len(arr) (*da_len_ptr(arr))

#define da_cap_ptr(arr) ((int*)arr - 1)
#define da_cap(arr) (*da_cap_ptr(arr))

#define da_base(arr) ((void*)da_len_ptr(arr))

#define da_append_slot(T, arr) \
        ((T*)_da_append_slot(sizeof(T), (void**)arr))

#define da_append(T, arr, elem) \
        (*da_append_slot(T, arr) = elem)

#define da_clear(arr) \
        (*da_len_ptr(arr) = 0)

void *_da_create(size_t type_size, int init_cap);
void *_da_append_slot(size_t type_size, void **arr);
void da_free(void *arr);

#endif // __MICRO_VEC_H__